Fixture for electric lamps.



No. 851,024. PATBNTED APR. 23, 1907. J. B. MOGINLEY.

FIXTURE PUR ELECTRIC LAMPS.

APPLIGATION FILED FEB. 19, 1906.

||| u l I 'fnnlllllllllllillI l WITNESSES: INVENTOR being ,indicated, respectively, by the linesA III III, IV IV, and V V, Fig. 2, the cap or` UNITED smiles PATENT OFFICE.-

JAMES B. MGGINLEY, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO NA- TIONAL METAL MOLDINGy `COMPANY, A CORPORATION OF PENNSYI- VAN IA.

FlxTimE Fon ELECTRIC LAMPS.

Patented Apriras, 1'907.

Application filed February 19, 1906. Serial No. 301,967;

Teall whom t may concern,.-

Be it known that I, JAMEs B. MCGINLEY, residing at Allegheny,in the county of Allegheny and State of Pennsylvania, a citizen of theUnited States, have invented or discovered certain new and useful Improvevments in Fixtures for Electric Lamps, of

which improvements the following is a specification.

The invention described herein relates to certain improvements in bases or supports for electric lamps, .such bases or supports being especially applicable where a number of lamps yare to be connected in multiple arc to th'e supply-circuit. j .The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 shows aI number of lamps with my improved bases or supports and conduit-sections containing the circuit-wires interposed between the supports. Fig. 2 is a plan view of the bottom or base portion of the fixture. Figs. 3, 4, and 5 are sectional views, the planes of section lamp-socket being shown in position on the base.

In the pr'actice of my invention I employ a fixture consisting of base and cover or cap portions yformed of porcelain or other non-v The base portion 1 isf provi/ded at its ends with recesses 2 for the re-` conducting material.

ception of lthe ends of the conduit-sections 3, containing the condu'tors. Grooves or channels 4 for thc recept'on of the conductors 5 are formed in the upper face of the base and extend from the recesses 2 at one end of the base to the corresponnding recesses at the opposite end thereof.i Metal contact-A plates 6 and 7 are secured tothe ridge 8 between the grooves or channels by means of' screws, one of said plates being so located that one of the pin-terminals 9 of the lamp when secured in its socket will contact therewith, while the other plate 7 is provided, as

shown, with a finger 10, which will extend alongside the sleeve contact or' terminal 11 of the lamp, as hereinafter described. One of the plates, as 6, extends into vone of the grooves or channels and the other plate 7 into the other channel into convenient proximity to the conductors, which are connected When metallicV conduits are employed, it

is necessary'that they should be grounded, and in order to avoid a separate ground connection for each sectionadjacent sections are electrically connected by a metal strip 13, which is arranged in a groove or channel 13a, formed in the under side of the base, as shown in Figs. 3 and 4. At its ends this strip is electrically connected t'o the conduit in any suitable manner. As facilitating the attachment of the strip to the conduit the end portions are bent up into notches 14 in the base and then out, so that the ends will bear upon the conduit adjacent to the ends of the base, as shown in Figs. 2, 4', and 5.

The cap or cover 15 is formed with a socket 16, which is rovided with suitable means for holding the amp. As lamps are nowgenerally formed with threaded stems or vbase por'- tions, it is preferred to internally thread the socket. The inner wall of the socket is vgrooved longitudinally fonthe reception of the finger 10 on the contact-plate 7. When free tQ'mOVe, this lfinger projects in beyond the innerwall of the socket, but is forced back into the groove when the lamp is screwed -in and being of resilient material will bear firmly against the sleeve-terminal of the lamp.' By this construction the employment of-a metal-lined socket rforthe lamp is avoided. It is preferred 'that the finger 10 should be formed with projections on 1ts inner face corres ondin with the threads on the inner wall o the soc et, as shown in Fig. 4. vIv claim herein as my yinventioni 1. A fixture for electric lamps having a base'formed of insulating material and provided at its ends with recesses for the reception of the endsfof conduits and with grooves in its upper face connecting the recesses, -in combination with contact-plates projecting into said grooves and rovided with means vfor connecting the con uctors to said plates.

` 2. A fixture for electric lamps having a base formed of insulating material and provided at ,its ends with recesses for the reception of the ends of conduits and with grooves or channels in its upper face connecting said v recesses and having a groove or channel in its under face, in comblnation with contactplates projecting into the upper grooves or channels and provided with means for connecting the conductors thereto; and a conducting-strip arranged in the under groove and adapted to be connected to the conduits.

3. A xture for electric lamps having a 5 base formedof insulating material and provided With grooves or 'channels in its upper face for the reception/0f conductors, contactplates secured tothe base and projecting into the grooves, one of said plates provided VWith 1 o ,an outwardly projecting iinger, in combina tion with a cap or cover of insulating material and provided With a socket having lamp-engaginmeans formed inte ral therewith.

4. fixture for electrlc lamps having a 15 base formed of insulating material and protion with a cap or cover of insulating material and provided with a socket having1 spiral ribs or threads formed on its inner Wa In testimony whereof I have hereunto set my hand. f

JAMES B. MCGINLEY.

Witnesses t CHARLES BARNETT, MoRRoW JOHNSTON. 

